Bautechnik

Sylomer®

Sylomer®

for vibration and structure-borne sound absorption

The Sylomer® material is a special PUR elastomer
which, with its compact, cellular form, has many
fields of use in construction technology and the
machine tools industry. In most cases Sylomer®
is used as pressure-loaded buffers. Spring properties
can be matched to the particular engineering design,
construction techniques and demands with careful
selection of the Sylomer® compound, contact
area and height.

SYLOMER® materials are available as continuously
produced web goods and are specially suitable
for use as a flat, full-surface elastic layer.
Furthermore, industrial moulded parts made from
Sylomer® are also available.

The standard series (see illustration) includes
Sylomer materials with densities of up to 680
kg/m³. Special types with a specifically
determined density or cross linking and solid
materials can be produced for special applications.
The fine cellular structure provides the distortion
volumes necessary to meet both static and dynamic
demands. This makes it possible to produce elastic
bearing systems with full-surface load transfer.
This provides great engineering and cost advantages,
especially within the construction industry.

Insulate against machine vibration effectively

Machines produce vibration. This vibration is
transmitted to the surroundings and can influence
manufacturing processes running on other machines
and thus the quality of the products. Vibrations
disturb the immediate neighbourhood and the environment
and cause damage to buildings. Sylomer® and
Sylodyn® are materials which effectively reduce
vibration and structure-borne noise. Depending
on requirements, they can be supplied in various
densities, material thickness and dimensions.
The static loading capability of these materials
lies within the range of 0.005 N/mm2 to 3.0 N/mm2
(0.5 t/m2 to 300 t/m2). Static and dynamic product
properties are precisely defined. The effectiveness
of the elastic bearing system can therefore be
calculated in advance. A typical use is as a direct
bearing system (covering the entire area and in
the form of strips or as a spot bearing system)
for machines using Sylomer® and Sylodyn®.

Direct bearings on Sylomer® and Sylodyn®

Loom base: Sylomer plates fitted beneath the
base reduce the transmission of vibration into
the floor.

In addition, elastic insulation of technical
equipment and machines used inside buildings reduces
the propagation of secondary airborne sound through
ceilings and walls. This measure effects a considerable
reduction in noise pollution in buildings containing
many different types of equipment; examples include
schools, hospitals, hotels and production facilities.

Adjustable machine base: an elastic Sylomer pad
fitted beneath the machine base effectively insulates
against vibration caused by motors, fans and pumps.
A varying number of machine bases is used, depending
on the weight of the equipment. The Sylomer®
pad is equipped with a compact PUR layer on the
side facing the floor. This facilitates equipment
assembly.

Bearing systems on an additional mass

Machines whose bearing systems have to be tuned
to low frequencies or which produce high levels
of dynamic forces are normally located on supplementary
support bodies such as, for example, a machine
base or foundation. Sylomer® and Sylodyn®
materials are used for active vibration insulation
(protection of the surrounding area) or for passive
insulation (protection of the machine).

Elastic bearing system for buildings

Figure 1

Figure 2

Figure 1 shows the insulation of a complete building.
The bearing system can be across the full surface
area, in the form of bearing strips or even individual
bearing points. The most favourable bearing system
and the point at which the building is insulated
depends on local conditions and the required tuned
frequency. Normally the elastic insulation is
arranged in the foundation area or directly beneath
the basement ceiling. Figure 2 shows Sylomer®
bearing strips fitted beneath a basement ceiling.
A decisive factor in dimensioning the bearing
system is the stress present at this point and
the required tuning frequency. In doing so different
Sylomer® types which vary locally can be used
to match the loads involved. In the case of constant
bearing thickness and a comparable, specific loading
for all bearings, the spring deflection is the
same. As a rule, excitement is effected by underground,
tram or rail tracks located nearby. If it is not
possible to implement measures at the trackbed
itself, the building can be protected effectively
against the introduction of vibrations by an elastic
bearing system.

Semi-finished products and construction
parts made from PUR elastomers for industry and
the machine tool sector